boost sputter?

[pullerfan]

ok so my problem while at like 2500-3k once i hit WOT it sputters until like 4k and then it seems like it clears up, i did a boost leak test and everything was fine. i'm all stock except for an intake.
i have some crappy plugs in it right now (could be a problem?) i've got some ngk's i just have to gap and put them in. i have ngk wires
i replaced my coil pak because the one on it had some rust in it, so i took the one off my 97' gst and put it in mine.
anyone have some ideas? i'm willing to check anything.
i'd like to get this fixed soon, i have a 16g, fmic, manifold, bov, turbo timer, and apexi tuner just waiting to get put on b4 i head back to college in a month so any help would be greatly appreciated

 

[Dert]

ok so my problem while at like 2500-3k once i hit WOT it sputters until like 4k and then it seems like it clears up, i did a boost leak test and everything was fine. i'm all stock except for an intake.
i have some crappy plugs in it right now (could be a problem?) i've got some ngk's i just have to gap and put them in. i have ngk wires
i replaced my coil pak because the one on it had some rust in it, so i took the one off my 97' gst and put it in mine.
anyone have some ideas? i'm willing to check anything.
i'd like to get this fixed soon, i have a 16g, fmic, manifold, bov, turbo timer, and apexi tuner just waiting to get put on b4 i head back to college in a month so any help would be greatly appreciated

The "I have crappy plugs in it now" is most likely your problem

 

[pullerfan]

well i forgot to mention that this didn't start happening untill i installed the new intake

 

[98mitsubishigst]

same problem happened to me

it was my plugs...
its accually starting to happen again to my car

gotta replace soon make sure u gap them right

 

[pullerfan]

well i hope its just the plugs, i've got some 6's so i'm gonna gap them real quick and go put them in